This is an OLD topic, but I know many people suffer from this (70% of guys will at some point), so I wanted to provide my routine and some research I've done over the past year.
I have a mild receding hairline (NW 1.5 - 2) but it has stabilized over the past year. My routine is:
Ketoconazole shampoo (mild DHT blocker, and clinically proven to help with hairloss but not FDA approved)
Minox (growth stimulant and FDA approved)
400mg Saw Palmetto (some clinical support)
1,000mg pumpkin seed oil (strong clinical support for retention and regrowth)
Dermaroller (strong clinical support for regrowth)
Multivitamin with b vitamins and singing nettle.
I know this is not related to height, but hope it helps someone